If you are adding an appendix to your paper there are a few rules to follow that comply with MLA guidelines:
The MLA Sample Paper Template may be used to set up your assignment. The template includes:
Abbreviations Commonly Used
Placeholders for unknown information like n.d. (“no date”) are no longer used. If facts missing from a work are available in a reliable external resource, they are cited in square brackets (2.6.1). Otherwise, they are simply omitted.
Visit the MLA Style Center for more information: MLA Style Center